CN1246645A - Head element, head, platen using them and camera using platen - Google Patents

Head element, head, platen using them and camera using platen Download PDF

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Publication number
CN1246645A
CN1246645A CN99118320.7A CN99118320A CN1246645A CN 1246645 A CN1246645 A CN 1246645A CN 99118320 A CN99118320 A CN 99118320A CN 1246645 A CN1246645 A CN 1246645A
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CN
China
Prior art keywords
head element
magnetic
magnetic head
pressing plate
peripheral surface
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN99118320.7A
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Chinese (zh)
Inventor
加藤实
藤村将行
小田桐真人
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Canon Electronics Inc
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Canon Electronics Inc
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Publication date
Application filed by Canon Electronics Inc filed Critical Canon Electronics Inc
Publication of CN1246645A publication Critical patent/CN1246645A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B1/00Film strip handling
    • G03B1/42Guiding, framing, or constraining film in desired position relative to lens system
    • G03B1/48Gates or pressure devices, e.g. plate
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B17/00Details of cameras or camera bodies; Accessories therefor
    • G03B17/24Details of cameras or camera bodies; Accessories therefor with means for separately producing marks on the film, e.g. title, time of exposure
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B2217/00Details of cameras or camera bodies; Accessories therefor
    • G03B2217/24Details of cameras or camera bodies; Accessories therefor with means for separately producing marks on the film
    • G03B2217/242Details of the marking device
    • G03B2217/244Magnetic devices
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/60Guiding record carrier
    • G11B15/62Maintaining desired spacing between record carrier and head
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/10Structure or manufacture of housings or shields for heads
    • G11B5/105Mounting of head within housing or assembling of head and housing

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Magnetic Heads (AREA)
  • Camera Data Copying Or Recording (AREA)

Abstract

A first magnetic core has a first portion that determines the track width, a second portion extending from the first portion substantially vertically, a third portion that extends from the second portion substantially vertically and is longer than the first track width, and a fourth portion extending from the third portion substantially vertically. The first to fourth portions form a substantially rectangular ring-like shape with its portion. A second magnetic core has a fifth portion longer than the first track width, a sixth portion extending from the fifth portion substantially vertically, and a seventh portion extending from the sixth portion substantially vertically. The fifth to seventh portions form substantially the shape of letter C. The first and second magnetic cores are joined to each other to form the magnetic head elements which used by the magnetic head, pressed board and camera.

Description

The camera of magnetic head element, magnetic head, the pressing plate that uses them and use pressing plate
The present invention relates to be used for/from the magnetic head element and the magnetic head of the magnetic recording/transcriber of magnetic medium record or information reproduction.
Specifically, the present invention relates to magnetic head element and magnetic head, be suitable for having be used for/from the camera of the magnetic head that is formed at magnetic storage part record on the film and information reproduction, have the camera pressing plate of magnetic head element or magnetic head and have the camera of pressing plate.
At present, use have the magnetic storage part and can/from the camera of the film of magnetic storage part record or information reproduction (for example photography conditions and date), commercially be developed and introduce.The information of relevant camera comprises exposure number, shutter speed, f-number, exposure correction value, date, title and the like.Camera comprise be used for/from the magnetic storage of film part record or reproduce the magnetic head of these information segments.
These information segments are recorded on the film, allow that film easily changes, and make development/printingout processing unanimity and for multimedia equipment finds application, promptly use the photographed image that utilizes film scanner to handle by computing machine.Therefore this technology is considered to promising technology.
Fig. 9 represents to write down or to reproduce the illustrative configurations of the camera of magnetic information.With reference to Fig. 9, reference marker 100 is represented camera body; 101 is camera lens; 102 for being loaded into the film loader in the camera body; And 103 be the film of carrying from film loader 102.Fig. 9 represents that film 103 is twined round spool 105 by deflector roll 104.Reference marker 106 representatives are used for giving the film guide piece of film 103 guiding along predetermined moving track; And 107 represent pressing plate, and it is at self and 106 clamping films of film guide piece, and supporting and be used to write down or the magnetic head 109 of information reproduction, so that make magnetic head 109 realize contacting slidably film 103.Pressing plate 107 by hold-down plate spring 108 by resiliency supported on one's body the camera.
As shown in Figures 9 and 10, be used for longitudinally being placed on the pressing plate 107 position corresponding to the end portion of film 103 from the/magnetic head 109 of reading/write magnetic information at film 103.Although the setting of magnetic head 109 is with the design variation of magnetic storage part, magnetic head 109 is set at the preset time record or reproduces photographic information in the frame unit of mobile film 103.
As shown in figure 10, when magnetic head 109 was installed on the pressing plate 107, window portion 107a formed on the precalculated position in pressing plate, and magnetic head 109 is exposed on the magnetic storage part 103a of film.Simultaneously, magnetic head is fixed on the pressing plate 107 according to orbital position, position angle with in the position of roller/roll spacing direction with high precision, so that realize contacting slidably film 103.
A pair ofly be used to help film 103 to move and 103 protrude from pressing plate 107 towards film, think the edge 103b guiding of film 103 for the pair of guide rods 112 of its location and 113.
Figure 11 represents a common magnetic head element.Figure 12 represents to comprise the magnetic head of this common magnetic head element.
Above-described magnetic head 109 has the configuration that is similar to one of Figure 11 and 12, and constitutes by the program of back.Magnetic core diad (halves) 120 is by piling up and connecting dull and stereotyped or to use many that magnetic sheet (for example permalloy or high rigidity permalloy) and so on forms be 1/2nd element 120a formation of C core basically by punching press.The surface that will be configured the magnetic core diad 120 of magnetic gap is betwixt ground/is overlapped, to constitute butting surface.After this, the coil former 122 with the coil 123 that is wound on it is installed in rear portion one side, and this faces one another connection to magnetic core diad 120 by the non magnetic element 121 that is used as magnetic gap, forms magnetic head thus.Magnetic head is configured usually by this way.
The magnetic head of Gou Chenging directly is contained in the holding frame 125 or (not shown) in the clamper by this way, and a kind of bonding agent is injected in this clamper.After this, the plane that film passes through is ground/is overlapped with the curved surface form, obtains magnetic head 109 thus.
The terminal 124 that is used to be electrically connected external circuit is the known elements of traditional magnetic head, can be integrally formed with above-described coil former 122, perhaps on holding frame, uprightly constitute, and coil 123 can be connected on the terminal 124.
Have under the magnetic head situation of representational role, be the influence that prevents to come from the noise of motor or center on magnetic head and so on, the shielding frame that holding frame 125 is preferably made by magnetic material.
Demand for the top camera size that reduces to write down or to reproduce magnetic information occurs, and comprises that therefore thin pressing plate of magnetic head just becomes needs.
Can write down or reproduce magnetic information and for example can write down therefore that the demand of the camera of the category information on date (camera in this instructions comprises the what is called dress camera lens film in this instructions) cost occurs for reducing.Therefore, the cost that reduces the parts be used to this camera just becomes needs.
In magnetic head, if being piled up by many magnetic sheets, magnetic core forms, then component costs just increases.In addition, when magnetic core diad element is connected to each other, different or track offset takes place by the variation in thickness of piling up each magnetic core that magnetic sheet constitutes.For this reason, when magnetic head is positioned in the pressing plate, just need the adjustment of orbital position, thereby caused the increase of assembly cost.In addition, when each magnetic core is piled up when forming by magnetic sheet, mutual horizontal can not be accomplished in the surface that contacts with magnetic gap separation scraper as magnetic gap, unless they are ground/overlap.For this reason, when magnetic head is installed in the holding frame, be difficult to the same position of head position in holding frame.In addition,, just need make magnetic head pinpoint many adjustings on pressing plate, cause the increase of assembly cost because the variation of this size causes the variation of magnetic gap position and position angle degree of accuracy.
According to this instructions, need ± 30 degree with interior position angle degree of accuracy.Consider various variations, camera is with regard to the formation problem, unless it is assembled in this tolerance deviation scope.For this reason, when magnetic head is installed in the pressing plate, just need enough adjustings.
In addition, under the situation that the camera size reduces, the motor that parts for example play the camera of magnetic head noise source effect is loaded near the magnetic head.Thus, the demand to the magnetic head that can be enough to resist dissimilar noises just produces.
The present invention has considered top problem, and as goal of the invention, is to realize the minimizing of magnetic head element size and cost, and makes magnetic head element easily and accurate localization in assembly manipulation.
Another object of the present invention provides antimierophonic magnetic head.
Another purpose of the present invention provides magnetic head, camera pressing plate that the magnetic head element that can realize above-mentioned purpose is housed and the camera that uses this camera pressing plate.
To achieve these goals, according to the present invention, for example provide a kind of magnetic head element, it comprises:
First magnetic core, it has: the first that determines first track width, the second portion that extends substantially vertically from first, extend substantially vertically and the third part longer from second portion than first track width, with the 4th part that extends substantially vertically from third part, wherein to have constituted be that part between the rectangular similar toroidal and first and second parts is left groove to first to the 4th part substantially;
Second magnetic core, it has: than the 5th long part of first track width, the 6th part and the 7th part that extends substantially vertically from the 6th part, wherein the 5th to the 7th part basic comprising letter C shape that extend substantially vertically from the 5th part; And
The magnetic gap separation scraper, it is made and is placed in by nonmagnetic substance between the first and the 5th part,
Wherein first has constituted the surface of intending by realizing slidably contacting with magnetic medium with the peripheral surface of the 5th part, and at least the three and the mass part of the 7th part and at least the four and the mass part of the 6th part piled up respectively and be connected to each other.
According to a further aspect in the invention, provide a magnetic head that comprises the said head element.This magnetic head comprises for example said head element; With
Frame parts, it have be used to install magnetic head element with reference to part,
Wherein magnetic head element is installed in the frame parts, simultaneously the outside surface of the 5th part of magnetic head element and frame parts with reference to section aligned.
According to another aspect of the invention, provide a camera pressing plate that comprises the said head element.This pressing plate comprises for example above-mentioned magnetic head element; With
One pressing plate main body, it forms with the magnetic head element integral die that is installed in the precalculated position,
The mould that wherein is used for mold pressing pressing plate main body has many register pins for magnetic head element location usefulness, and these many register pins have been determined the side surface position longitudinally of the 5th part of this magnetic head element, and at least one of first stretched to the position on surface of the peripheral surface of the peripheral surface of second portion and the 5th part in open end one side.
According to a further aspect of the invention, provide a camera that comprises the camera pressing plate.
Other features and advantages of the present invention will become clear in the description taken together with the accompanying drawings from behind, wherein spread all over the same reference character TYP or the similar parts of institute's drawings attached.
Comprised and constitute an instructions part description of drawings embodiments of the invention, it and describe one and be used from and explain principle of the present invention.
Figure 1A and 1B are used to explain the magnetic core figure that constitutes magnetic head element according to first embodiment of the invention;
Fig. 2 A and 2B are the figure that represents magnetic head element according to first embodiment;
Fig. 3 A and 3B represent that as Figure 1A 1B uses the magnetic head of magnetic core and the skeleton view of coil former shown in 2A and the 2B;
Fig. 4 A and 4B are the magnetic head figure that represents to comprise magnetic head element (Fig. 3 A and Fig. 3 B) as described in first embodiment;
Fig. 5 is the camera pressing plate figure that comprise magnetic head element of expression shown in Fig. 3 A and 3B;
Fig. 6 A and 6B are the magnetic head figure of expression according to the 4th embodiment;
Fig. 7 is expression includes magnetic head according to the 4th embodiment pressing plate figure;
Fig. 8 A and 8B are the magnetic head figure of expression according to the 5th embodiment;
Fig. 9 is the synoptic diagram of configuration that the camera of magnetic information could be write down or reproduce to expression;
Figure 10 explains how magnetic head element is installed in the view in the common pressing plate;
Figure 11 is the figure of the common magnetic head element of expression; And
Figure 12 is the figure that expression comprises the magnetic head of common magnetic head element.
The preferred embodiments of the present invention now will be described in detail with reference to the accompanying drawings.
<the first embodiment (magnetic head element) 〉
Figure 1A and 2B are the figure that explains the magnetic core that constitutes magnetic head element according to this embodiment.Fig. 2 A and 2B are the figure of the magnetic head of this embodiment of expression.This magnetic head element becomes a similar unit shown in Fig. 2 A and 2B or Fig. 3 A and 3B by assembling this shown in Figure 1A and 1B to magnetic core and constitutes.
Magnetic core shown in Figure 1A is made by flat magnetic material, and has the first of definite track width Tw1, the second portion that extends substantially vertically from first, extend substantially vertically and the third part longer from second portion than first track width, and the 4th part that extends substantially vertically from third part.First to the 4th part has constituted that to have be rectangular similar toroidal by recessing part substantially between the first and the 4th part.Second portion its with third part between have into stepped part on the annular surface in borderline.Have as the first of upside with as the C-shape part 1c of the step portion of the second portion of downside, upper left half part of magnetic core 1 is configured in Figure 1A.Third and fourth part right side below Figure 1A magnetic core constitutes a upright part.This part will be known as L-shape part after this.In other words, the shape of magnetic core 1 is to make C-shape part 1c be contained in the bottom that is rotated counterclockwise 90 ° L-shape part 1d by the L shaped shape of letter.
With reference to Figure 1A, the upside (first) of C-shape part 1c is to limit the part of record or reproduction track width and have width Tw1.The first that limits the track width Tw1 of magnetic core 1 has predetermined recording or reproduces magnetic gap degree of depth Gd in openend one side.First has the sloping portion 1a that θ 1 at a predetermined angle extends to second portion from the lower end.C-shape part 1c also has the sloping portion 1e that has predetermined angle theta 2 at downside.These sloping portions 1a and 1e have constituted C-shape part 1c and have gone up the part 1b that is opened trapezoidal groove.Notice that angle θ 1 is preferred in 15 ° to 25 ° scope, and more preferably 18 °.And, angle θ 2 preferably in 0 ° to 15 ° scope, and more preferably 8 °.In addition, the degree of depth E that is opened trapezoidal groove part 1b be preferably track width Tw1 2/3 or less than it.
L-shape part 1d is the magnetic core part that is extended, and is used for reducing the magnetic resistance of the magnetic circuit that forms when magnetic core 1 is connected on Figure 1B (will be described later) magnetic core, and prevents the magnetic saturation of magnetic core.
Magnetic core 2 shown in Figure 1B is made of flat magnetic material, and has the 5th part, the 6th part that extends substantially vertically from the 5th part and the 7th part that extends substantially vertically from the 6th part.These the 5th to the 7th parts constitute basic C-shape part.Has track width Tw2 as the 5th part of the upper portion of magnetic 2 greater than the track width Tw1 of magnetic core 1.Notice that track width Tw2 preferably is in 1.5 to 3 times the scope of track width Tw1, and 2 times of track width Tw1 more preferably.
The openend of the upper portion of magnetic core 2 (the 5th part) has the predetermined recording that is similar to magnetic core 1 or reproduces magnetic gap degree of depth Gd.Sloping portion 2a extends with tiltangle 3 from the lower end of the upper portion of magnetic core 2.In this case, tiltangle 3 preferably equals the tiltangle 1 of magnetic core 1.
In addition, magnetic core 2 has sloping portion 2b, and itself and sloping portion 2a are continuously and have a tiltangle 4 that is different from sloping portion 2a.In this case, θ 4 preferably in 0 ° to 15 ° scope, and more preferably 8 °.
Shown in Fig. 2 A and 2B, above-mentioned magnetic core 1 and 2 is connected to each other.More particularly, two magnetic cores are piled up mutually, so that the sloping portion 2a of the sloping portion 1a of magnetic core 1 and magnetic core 2 crosses one another along relative direction, and align with the counterpart of magnetic core 2 in the side end face of that part with magnetic core 1 of track width Tw1.The side surface of two magnetic cores (roll surface of flat magnetic element) is connected to each other with the method for for example bonding agent or welding, constitutes magnetic circuit thus.When magnetic core 1 and 2 interconnects, be connected on the 5th part as the upper portion of magnetic core 2 by the non magnetic separation scraper 3 that is used as magnetic gap as the first of the upper portion of magnetic core 1.In addition, the side surface of third and fourth part of magnetic core 1 is connected to respectively on the side surface of the 7th and the 6th part of magnetic core 2.
Intersection Ge between sloping portion 1a and 2a is limited by tiltangle 1 and θ 3.These sloping portions are assembled shown in Fig. 2 B, to improve the magnetic saturation characteristic that causes because of the sloping portion with angle θ 1 and θ 3.In addition, the track width Tw2 of magnetic core 2 is enough to the track width Tw1 greater than magnetic core 1.Therefore, even these parts are connected to each other with slight biasing, it is littler than predetermined track width Tw that the track width of assembled magnetic head element does not become.In other words, needed track width can be simply guaranteed with the track width Tw1 of magnetic core 1.
Notice as non magnetic separation scraper 3, can use the nonmagnetic metal paper tinsel, for example titanium or copper beryllium alloy paper tinsel.A kind of like this metal forming can be in magnetic core one or two on form by known method (for example coating, deposit or (cathode) sputtering).
When magnetic core 1 and 2 was connected to each other, the coil former 4 with the coil 5 around being wrapped in was installed on the C-shape part 1c of the magnetic core 1 that is formed recessing part 1b shown in Fig. 2 A and 2B thereon, forms magnetic head element 7 thus.
In this case, if the internal diameter of coil former 4 is set the track width Tw1 less than magnetic core 1, then coil former 4 can be easy to assembling, and the depth D of magnetic head can be reduced simultaneously.The minimizing of this size impact camera size and profile, and its minimizing is in demand.The magnetic head element of this embodiment can address that need and promote the minimizing of camera size and profile.
According to the top configuration of magnetic head magnetic core, shown in Fig. 2 B,, just prevented the magnetic saturation of magnetic core, and magnetic saturation characteristic improves because sloping portion 1a and 2a cross one another along relative direction.More particularly, when being similar to those sloping portions shown in Fig. 2 B and being configured and assembling with diverse location, begin to become magnetic saturation even if having a magnetic core of less cross sectional area, but because other magnetic core has wider cross sectional area, so can prevent that two magnetic cores are simultaneously by magnetic saturation.If there is not sloping portion to be formed, to when magnetic flux surpasses the saturation magnetic flux density of magnetic core, two magnetic cores just spread all over track width by saturated immediately.
In addition, by sloping portion 2b, the distance between the top of coil 5 and magnetic core 2 can be held.This can reduce the leakage flux between magnetic core 2 and the coil 5.For this reason, angle θ 4 preferably is set to 0 °.Yet for keeping the intensity of these parts, angle θ 4 is set to larger than 0 °, can satisfy the dual needs that prevent leakage flux and increase strength of parts thus.
In addition, coil former 4 that part (among Figure 1A C-shape part lower portion) of being installed in the magnetic core 1 on it is preferably thick as much as possible on the thickness direction of coil former 4.Yet thick if this part is done, sloping portion 1e just near sloping portion 1a, causes leakage flux.Sloping portion 1e with angle θ 2 is configured thus, so that the coil former mounting portion is enough thick, guarantees the lower portion of C-shape part 1c and the enough distances between upper portion simultaneously.If the enough distances according to leakage flux between sloping portion 1e and sloping portion 1a can be guaranteed, the adequate thickness of coil former mounting portion can be kept and sloping portion 1e not simultaneously, and angle θ 2 can be set to 0 ° so.
Fig. 3 A and 3B are that Figure 1A, 1B, the skeleton view of the magnetic core among 2A and the 2B and the magnetic head element of coil former are used in expression.With reference to Fig. 3 A and 3B, be connected to terminal 6 and 6 ' by the end portion of the coil 5 around coil former 4, to constitute coil component.As shown in Figure 3A, magnetic core 1 and 2 passes through magnetic gap separation scraper 3 and this coil component combination as shown in Figure 3A, to constitute the magnetic head element 7 shown in Fig. 3 B.
As mentioned above, according to the magnetic head element of present embodiment, realize the assembling of magnetic head element easily, the degree of depth of magnetic head can be reduced to and obtain the magnetic head that size reduces simultaneously.In addition, sloping portion 1a and 2a can improve its magnetic saturation characteristic.In addition, the L-shape of magnetic core 1 has partly increased the area on the connection plane between the magnetic core 1 and 2, with the minimizing of acquisition magnetic resistance and the improvement of magnetic saturation characteristic.
Further, as will being described among the embodiment in the back, g part and end face (Fig. 3 B) t with magnetic core 2 of track width Tw2 allow to be easy to azimuth adjustment and the adjusting of easy tracks positioned to magnetic head element when being installed in the device.Clarified among the embodiment that this point will be described below.
<the second embodiment (magnetic head) 〉
Fig. 4 A and 4B represent to be included in the magnetic head of the magnetic head element of describing among first embodiment (Fig. 3 B).Magnetic head element 7 shown in Fig. 3 B is mounted and fixed in the framework 8, and the side surface 9a that contacts with film with letter r type (cylindrical surface) by being ground/overlapped, constitute magnetic head 9 thus.
Notice the terminal 6 and 6 ' that is used to link on the external circuit,, perhaps erectly forming on the framework 8 and be connected on the coil 5 as can and being connected on the coil 5 that provides as coil component that reference Fig. 3 A and 3B are described with coil former 4 whole formation.
The profile of reference framework 8, magnetic head element 7 is installed in the top of framework 8 and is pressed towards simultaneously with reference to surperficial T with reference to surperficial G, wherein carried magnetic core 1 and 2 connected surfaces (the t part among Fig. 3 B), and carried the whole side plane (the g part among Fig. 3 B) of the part (upper portion among Figure 1B) of magnetic core 2 with track width Tw2 with reference to surperficial G with reference to surperficial T.With this structure, the high precision of the high precision of tracks positioned and position angle (degree of tilt) is easy to keep.Therefore, magnetic head element can be by simultaneously locating the reference position that it presses to pressing plate 107 with reference to top Fig. 9 and the 10 described magnetic heads of installing simply.
As mentioned above, the 9b among Fig. 4 A is pressed towards reference plane G and the formed magnetic gap of T simultaneously when magnetic head element 7 is installed in the framework 8.This part has been filled resin, so that magnetic head element 7 is fixed in the framework 8.
In this case, azimuthal degree of accuracy is determined when that g of the magnetic core 2 with track width Tw2 partly is pressed towards reference plane G.As first embodiment was described, the track width Tw2 of magnetic core 2 was 1.5 to 3 times (being preferably twice) of the track width Tw of prior art.In general, the framework of clamping magnetic head element has the window that is used to expose slidingsurface, and the size of this window is less times greater than the thickness of magnetic core.In other words, the magnetic gap of Que Dinging is present in along between the window and magnetic head element of track width direction.Therefore, tightly the contact reference is not surperficial if magnetic core moves, and will setover in the magnetic gap weight range.Yet magnetic head element according to present embodiment, even biasing takes place with the magnetic gap amount identical with common magnetic head (have magnetic head element along the track width Tw of track width direction size) no better than, the position angle degree of accuracy also resembles 1/1.5 to 1/3 when Tw2 is the Tw twice (if then be 1/2) that obtained when using traditional magnetic head element height.In addition, owing to resemble the gross thickness of magnetic core 1 and 2 little along size perpendicular to the magnetic head element of the thickness direction of the magnetic core of track width, so the variation of the orbital position that is caused by inclination is with regard to less (have in large-sized traditional magnetic head element at the thickness direction along magnetic core, the orbital position that is caused by inclination changes greatly).
When reproducing head was used the structure of this magnetic head 9, the magnetic core zone that particularly is exposed under the slidingsurface became quite little.Therefore, the neighbourhood noise that overflows in the magnetic core becomes less, and magnetic head is subjected to less noise effect.
<the three embodiment (camera pressing plate (first)) 〉
The camera pressing plate that is included in the magnetic head element 7 in 3 is described in the back with reference to Fig. 3 A and 3B.Fig. 5 represents to comprise the camera pressing plate of magnetic head element among Fig. 3.As shown in Figure 5, when film pressing plate 10 used plastic materials to make, pressing plate 10 and magnetic head element 7 were formed by integral body by mold pressing.Therefore, the pressing plate shown in Fig. 5 10 can be counted as doing as a whole magnetic head 15.
Pressing plate 10 has the guide piece 112 and 113 for film guiding, and the hole 11 to 13 that is made of three register pins that form on the mould that is used for molded pressing plate 10.The register pin that forms hole 11 to 13 after this in Fig. 5 will be known as first to the 3rd register pin respectively.
These three register pins are configured on the mould that is used for molded pressing plate 10.First register pin be set to allow the end face of magnetic core 1 and 2 be aligned with each other (the t part among Fig. 3 B) in the location positioning of separating for distance H, and this distance H is corresponding to from the film contact jaw 112a of the guide piece 112 that is connected to film edge 103b guiding and 113 and the distance that links to orbital position of 113a.The second and the 3rd register pin has determined magnetic core 2 corresponding to track width Tw2 position of (g part among Fig. 3 B) on side surface.Therefore, the second and the 3rd register pin has been determined the magnetic gap position (this position is corresponding to the distance of the contact jaw 112a of guide piece 112 in the framework thus) and the azimuth position of magnetic core 2.
Mold pressing is done, and the t of magnetic head element 7 part closely contacted by the first register pin clamping, and the g of magnetic head element 7 part is closely contacted by second and third register pin clamping.As a result, hole 11 to 13 forms on the position shown in Fig. 5, and magnetic head element 7 is included in the pressing plate 10.The transverse shape of noticing each register pin is not limited to circle, and can take Any shape, for example rectangle.
This magnetic head element 7 is in advance by grinding/overlap joint when the slidingsurface that enters the magnetic head element 7 that contacts with film need be trimmed, and magnetic head element 7 is installed in the pressing plate 10 as the reference surface by using by grindings/overlap joint is surperficial.By this operation, magnetic head is accurately determined in the position of roller and roll spacing direction.
Azimuthal degree of accuracy is to determine when that part of the magnetic core with track width Tw2 is pressed towards the second and the 3rd register pin.The track width Tw2 of magnetic core 2 is 1.5 to 3 times (being preferably twice) of prior art middle orbit width Tw.For this reason, even magnetic core is setovered with same magnetic gap, position angle degree of accuracy so in this embodiment also resembles 1/1.5 to 1/3 (being preferably 1/2) high.In addition, the thickness of magnetic core equals the gross thickness of magnetic core component, and the orbital position that is caused by inclination changes less.In other words, magnetic head element can only be accurately positioned by magnetic head element 7 is pressed to register pin.
As mentioned above, according to the 3rd embodiment, because pressing plate 10 and magnetic head element 7 can form by integral body by mold pressing, so just do not need framework.Like this, the quantity of the quantity of parts and step just can be reduced.In addition, because magnetic head element 7 can be easy to the location with high precision, just can obtain the huge reduction of assembly cost.
<the four embodiment (camera pressing plate (second)) 〉
In the 3rd embodiment, magnetic head element 7 is included in the camera pressing plate.In contrast, in the 4th embodiment, magnetic head element 7 is installed in the framework constituting magnetic head, and framework is installed on the camera pressing plate.
In the 4th embodiment and since magnetic head element 7 by by magnetic material for example permalloy make framework and sealed, so the impedance of neighbourhood noise has just been improved.Therefore, though noise source for example motor be present near the magnetic head because the minimizing of camera size, magnetic head will play a part to write down or reproducing head without any operate miss ground.
Fig. 6 A and 6B represent the magnetic head according to the 4th embodiment.With reference to Fig. 6 A and 6B, framework 20 have expose magnetic core 1 and 2 aim at end faces (t part among Fig. 3 B) and corresponding to the side surface (g part among Fig. 3 B) of the rail portion of magnetic core 2 by the part 20a of recessing.After magnetic head element 7 was mounted/is fixed in the framework 20, the surperficial 21a that film passes through was ground/is overlapped, to form magnetic head 21.
As in a second embodiment, profile with reference to magnetic head element 7, magnetic head element 7 is installed in the framework 20, be pressed towards simultaneously with reference to surperficial T with reference to surperficial G, wherein carry the end face (t part among Fig. 3 B) that is aligned, with reference to the side surface (g part in Fig. 3 B) of surperficial G carrying corresponding to this part (upper portion among Figure 1B) of the track width Tw2 of magnetic core 2 with reference to surperficial T.20b part in Fig. 6 A is to be installed in the framework 20 magnetic gap that constitutes when closely contacting with G with reference to surperficial T when magnetic head element 7.This part is filled with resin, with fixed head element 7.
Fig. 7 represents to comprise the pressing plate according to the 4th embodiment magnetic head.Magnetic head 21 among Fig. 6 is by the location of the head position hole 22a in being formed in pressing plate 22, simultaneously as shown in Figure 7 by the part 20a of recessing, realize be formed at pressing plate 22 on localization part 22b closely contact to be fixed, set orbital position H thus, magnetic gap position L and azimuth position.The side surface (g part) of end face that the magnetic core 1 and 2 that is exposed as the part 20a by recessing is aligned (t part) and magnetic core 2 rail portion is when being pressed towards localization part 22b, and magnetic head 21 can easily be located.
In this case, magnetic head 21 in the framework of making by permalloy or analog, can as the 3rd embodiment, easily be positioned in the pressing plate 22, and the decline of the neighbourhood noise amount on magnetic core, realize that thus noise does not almost have the magnetic head of influence to it.
In this embodiment owing to have as shown in Figure 7 that the pilot hole 22a of localization part 22b forms in pressing plate, so even the pressing plate that constitutes by the metal plate material by extrusion operation, the pressing plate of can rather than plastic making by mold pressing uses.
<the five embodiment (camera pressing plate (the 3rd)) 〉
In the 4th embodiment, the side surface (g part) of the rail portion of end face that the magnetic core 1 and 2 of magnetic head element is aligned (t part) and magnetic core 2 is exposed to be accurately positioned.In contrast, in the 5th embodiment, provide minimizing magnetic head element 7 to be exposed structure partly, allow that simultaneously magnetic head element 7 easily is positioned in the pressing plate to improve noise resistance.
Fig. 8 A and 8B represent the magnetic head according to the 5th embodiment.Shown in Fig. 8 A and 8B, in the 5th embodiment, be used for magnetic core 1 and 2 the end face that is aligned location pilot hole 31 and be used for determining that the magnetic gap position L of magnetic core 2 and the pilot hole 32 and 33 of azimuth position form at framework 30, with in framework 20, form among the 4th embodiment that replaces describing with reference to Fig. 6 A and 6B by the part 20a of recessing.These pilot holes 31,32 and 33 are about accurately being located the direction that is extruded back to magnetic head element 7 with reference to surperficial T and G.As among second and four embodiment, the t of magnetic head element 7 partly has been implemented with g and has contacted with reference to surperficial T and the tight of G, and 35a partly is filled with resin simultaneously, thus magnetic head element 7 is installed/is fixed in the framework 30.
When the magnetic head 35 that obtains in this way was installed in the pressing plate, this magnetic head can be positioned in the pressing plate with pilot hole 31,32 and 33 by using locating device (jig), perhaps can be with the pressing plate integral die as the 3rd embodiment.
As the 3rd embodiment, be used to the register pin of magnetic head element 7 location can be in advance to constitute on the mould of magnetic head being used for, simultaneously magnetic head element 7 with these register pins be positioned and be molded/be installed in the pressing plate.By this way, magnetic head element 7 can integrally be contained in the pressing plate constituting magnetic head 35, and pilot hole 31 to 33 is also formed by these register pins.
As mentioned above, according to being used in magnetic head among above-mentioned each embodiment, because magnetic core made by flat magnetic part, so the minimizing of each magnetic core cost can accomplish that and the track width of being scheduled to is guaranteed easily.In addition, azimuthal high precision can be by being guaranteed in conjunction with magnetic core with planned orbit width and the magnetic core with track width of 1.5 to 3 times of planned orbit width, and this magnetic core can easily be located about camera pressing plate or analog, easily obtains the high precision of location, position angle thus.
In addition because the side surface of magnetic part is connected to each other so that each sloping portion that extends from lower end at a predetermined angle with magnetic gap degree of depth part (1a 2a) crosses one another in opposite direction, so the magnetic saturation of magnetic core can be prevented from.
In second to the 5th embodiment, the end face that magnetic core 1 and 2 is aligned is defined as the t part.Yet as the part that is used to locate, one or two in the end face of the magnetic core 1 of t part or 2 can be used.
Obviously, the pressing plate 107 that can be used as in Fig. 9 camera of the pressing plate of the 3rd to the 5th embodiment of Miao Shuing in each is mounted in the above, has the camera that is similar to a magnetic head element among first embodiment to provide.
As mentioned above, according to the present invention, the minimizing of area of bed and cost can be implemented, and magnetic head element can be located in fitting operation easily and accurately.
According to the present invention, provide a kind of antimierophonic magnetic head.
Because many obviously and extensively different embodiment of the present invention can accomplish and not break away from its spirit and scope, so should be appreciated that, except the content defined in claims, the present invention is not limited to its specific embodiment.

Claims (16)

1. a magnetic head element comprises:
First magnetic core, it has: the first that determines first track width, the second portion that extends substantially vertically from first, extend substantially vertically and the third part longer from second portion than first track width, with the 4th part that extends substantially vertically from third part, and first to the 4th part has constituted and has had between the first and the 4th part that to be left groove part be rectangular similar toroidal substantially;
Second magnetic core, it has: than the 5th long part of first track width, the 6th part and the 7th part that extends substantially vertically from the 6th part, wherein the 5th to the 7th part basic comprising letter C shape that extend substantially vertically from the 5th part; And
The magnetic gap separation scraper, it is made and is placed in by nonmagnetic substance between the first and the 5th part,
Wherein first has constituted the surface of intending by realizing slidably contacting with magnetic medium with the peripheral surface of the 5th part, and at least the three and the mass part of the 7th part and at least the four and the mass part of the 6th part piled up respectively and be connected to each other.
2. according to the magnetic head element of claim 1, wherein the peripheral surface in the surface of the first on the outer ring side of second portion and the 5th part on openend one side flushes mutually basically.
3. according to the magnetic head element of claim 1, wherein the opening side end face of first has along the preset width of magnetic gap depth direction, and the interior annular surface inclination of first, so that increase towards the second portion direction along the width of magnetic gap depth direction, and
The opening side end face of the 5th part has along the preset width of magnetic gap depth direction, and the interior annular surface inclination of the 5th part, so that increase towards the 6th part direction along the width of magnetic gap depth direction.
4. according to the magnetic head element of claim 3, wherein the pitch angle of the pitch angle of the 5th part and first basically mutually equates in the place that the first and the 5th part is piled up mutually on it at least.
5. according to the magnetic head element of claim 3, wherein second portion its with third part between have into stepped part on the annular surface in borderline, and constituted and had as the first of upside with as the basic C-shape part of the step portion of the second portion of downside.
6. according to the magnetic head element of claim 5, wherein the stepped part of second portion has inclination on the upstanding portion of second portion, and the stepped part of the sloping portion of first and second portion constitutes the part of being opened trapezoidal groove.
7. according to the magnetic head element of claim 4, it further comprises the winding part on the stepped portion branch that is contained in second portion.
8. according to the magnetic head element of claim 3, wherein the inclination of the 5th part comprises first sloping portion that extends and have first pitch angle from openend one side, and has second sloping portion less than the pitch angle at first pitch angle.
9. magnetic head comprises:
Be limited to the said head element in the claim 1; And
Have the frame parts that is used to install above-mentioned magnetic head element with reference to part,
Wherein the said head element is installed in the said frame parts, and the outside surface of the 5th part of said head element is aimed at the reference part of said frame parts simultaneously.
10. magnetic head comprises:
Be limited to the said head element in the claim 1; And
Have first and second the frame parts that are used to install above-mentioned magnetic head element with reference to part,
Wherein the said head element is installed in the said frame parts, the side surface of the 5th part of said head element is longitudinally aimed at reference to part with first simultaneously, and stretch at least one surface of first of the peripheral surface of the peripheral surface of second portion and the 5th part, aim at reference to part with second in openend one side.
11. a pressing plate that is contained in the camera, it comprises:
Be limited to the said head element in the claim 1; And
With the said head element that is installed in the precalculated position by the pressing plate main body of integral die,
The mould that wherein is used for the above-mentioned pressing plate main body of mold pressing has the many register pins that are used for said head element location, and these many register pins have been determined the side surface position longitudinally of the 5th part of said head element, and at least one surface of first of peripheral surface of stretching to the peripheral surface of second portion and the 5th part is in the position of openend one side.
12. a pressing plate that is contained in the camera, it comprises:
One magnetic head, the said head element that it combines the said head element that is limited in the claim 1 and has the part of being exposed, and in the part that is exposed, the side surface part of at least the five part longitudinally, part with one of first surface of the peripheral surface of peripheral surface that stretches to second portion at least and the 5th part is exposed in openend one side; And
One pressing plate main body, it has and is used to expose the slidably window portion of surface in contact of said head element,
Wherein said head is installed in the above-mentioned pressing plate main body, and the marginal portion that constitutes the window portion of above-mentioned pressing plate main body simultaneously is implemented tight contact the with the part that is exposed of said head element.
13. a camera pressing plate, it comprises:
Be limited to the said head element in the claim 1;
One frame parts, it has longitudinally from the surface of the first of the side surface of the 5th part of said head element or the peripheral surface that at least one stretches to second portion peripheral surface and the 5th part openend, with the hole of predetermined relative positions location; And
One pressing plate main body wherein is equipped with the magnetic head that forms by said head element adding said frame parts,
Wherein said head is installed in the above-mentioned pressing plate main body and locatees with pilot hole simultaneously.
14. according to the pressing plate of claim 13, wherein the said frame parts have the first and second reference parts and the many pilot holes about the first and second reference part location that are used to install above-mentioned magnetic head element, and
The said head element is installed in the said frame parts, simultaneously the side surface of the 5th part of said head element is longitudinally aimed at reference to part with first, and at least one surface of first of stretching to the peripheral surface of the peripheral surface of second portion and the 5th part is partly aimed at second reference in openend one side.
15. according to the pressing plate of claim 13, wherein said head has as many register pins of said head element location with the mould that forms said head with said frame parts monolithic molding by using,
The side plane of said head element the 5th part longitudinally and at least one surface of first of stretching to the peripheral surface of the peripheral surface of second portion and the 5th part, openend one side about first with reference to part by many register pins location, and
Many register pins are made of many pins.
16. a camera is characterized in that it comprises the above-mentioned camera pressing plate that is limited in the claim 11.
CN99118320.7A 1998-08-27 1999-08-27 Head element, head, platen using them and camera using platen Pending CN1246645A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP10242145A JP2000076607A (en) 1998-08-27 1998-08-27 Magnetic head element, magnetic head, pressing plate using either one of the foregoing, and camera using such pressing plate
JP242145/1998 1998-08-27

Publications (1)

Publication Number Publication Date
CN1246645A true CN1246645A (en) 2000-03-08

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN99118320.7A Pending CN1246645A (en) 1998-08-27 1999-08-27 Head element, head, platen using them and camera using platen

Country Status (3)

Country Link
US (1) US6157786A (en)
JP (1) JP2000076607A (en)
CN (1) CN1246645A (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08166637A (en) * 1994-12-15 1996-06-25 Nikon Corp Positioning device
US5721652A (en) * 1995-07-25 1998-02-24 Eastman Kodak Company Roll stabilized, nesting VEE, magnetic head assembly for magnetics-on-film
US5987267A (en) * 1997-01-20 1999-11-16 Nikon Corporation Magnetic recording/reproducing apparatus of camera

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US6157786A (en) 2000-12-05

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